Ejemplo n.º 1
0
  /**
   * get current process cpu usage data.
   *
   * @param pid process id
   * @return ProcessUsage
   */
  private ProcessUsage currentProcessUsage(final long pid) {
    String file = getProcessStatFile(pid);

    try {
      String cpuline = FileUtils.file2string(file);
      return new ProcessUsage(cpuline);
    } catch (IOException ioe) {
      System.err.println("cannot find stat of process: " + pid);
      System.exit(1);
      return null;
    }
  }
Ejemplo n.º 2
0
  /**
   * get current thread cpu usage data.
   *
   * @param pid process id
   * @param tid thread id
   * @return ThreadUsage
   */
  private ThreadUsage currentThreadUsage(final long pid, final long tid) {
    String file = getThreadStatFile(pid, tid);

    try {
      String cpuline = FileUtils.file2string(file);
      return new ThreadUsage(cpuline);
    } catch (IOException ioe) {
      System.err.println(String.format("cannot find stat of process: %d, thread: %d", pid, tid));
      System.exit(1);
      return null;
    }
  }
Ejemplo n.º 3
0
  /**
   * read /proc/cpuinfo to get cpu numbers.
   *
   * @return cpu number
   */
  public static int numCpus() {
    List<String> cpuline_list = null;

    try {
      cpuline_list = FileUtils.grepFile(CPU_NUM_PATTERN, CPU_INFO_FILE);
    } catch (IOException ioe) {
      System.err.println("cannot find stat file: " + CPU_STAT_FILE);
      System.exit(1);
      return 0;
    }

    if (cpuline_list != null) {
      return cpuline_list.size();
    }

    return 0;
  }
Ejemplo n.º 4
0
  /**
   * get current cpu usage data.
   *
   * @return CPUUsage
   */
  private CPUUsage currentCPUUsage() {
    List<String> cpuline_list = null;

    try {
      cpuline_list = FileUtils.grepFile(CPU_JIFFIES_PATTERN, CPU_STAT_FILE);
    } catch (IOException ioe) {
      System.err.println("cannot find stat file: " + CPU_STAT_FILE);
      System.exit(1);
      return null;
    }

    if (cpuline_list != null && !cpuline_list.isEmpty()) {
      return new CPUUsage(cpuline_list.get(0));
    }

    return null;
  }
Ejemplo n.º 5
0
  /**
   * read /proc/cpuinfo to get cpu frequency in hz.
   *
   * @return cpu frequency in hz
   */
  public static long cpuFrequencyInHz() {
    List<String> cpuline_list = null;

    try {
      cpuline_list = FileUtils.grepFile(CPU_FREQ_PATTERN, CPU_INFO_FILE);
    } catch (IOException ioe) {
      System.err.println("cannot find stat file: " + CPU_STAT_FILE);
      System.exit(1);
      return 0;
    }

    if (cpuline_list != null && !cpuline_list.isEmpty()) {
      String freqstr = cpuline_list.get(0);

      int len = freqstr.length();

      BigDecimal freq = new BigDecimal(freqstr.substring(0, len - 3));
      long multiplier = getMultipiler(freqstr.charAt(len - 3));

      return freq.multiply(new BigDecimal(Long.toString(multiplier))).longValue();
    }

    return 0;
  }